Machine for heating surfaces.



MACHINE POR, 'HEATING SURPACJS.v

' .l APPLICATION FILED PEB. 10. 1908.

mjy v @M600/Kliff.;

PATEN'IED DEC. 18j 1906.

UNITED STATES PATENTI oEEIoE.

'GEORG'EIL LUTZ, or KANSASUITY, MISSOUEI,AssIerNoI2,-1sr DIRECT AND MESNE ASSIGNMENTS, To EQUITABLE ASPHALT MAINTENANCE COMPANY, A CORPORATION OF MISsoUEI.

Specification of Letters Patent.'-

Patented Dec. 18, 1906.

y Application filed February 1p, 1906. Serial No. 800,422.

, vention, such as 'will enable' others skilled inf lIc the art to which. it appertains to make and use the same, referencebeing had to the accompanying drawings, and'to the figures of' referencemarked thereon, which form a part of this specification. I

-ingvsurfaces, and more articularly to amachine for heating aspha t avements. I am aware that machines of t 's character have been use'which em loy fans for driving la 2o iluid heating medium produced in the com bustion-chamber through a li-suitable conduit .i which directs it upon the surface to .be heated,lbu t have found 4that the excessive heat of the combustionfchamber seriously interferes 2 5 with the operation of the fan'machinery and decreases the efliciencyof the machine. Itis the object of my present invention to rovide a new land improved -means for drawmg the/fluid heating mediumgfrom the com- 3o bustion-chamber and forcingi onto the pavement. In accomplishing this object I have provided the improved details ofstructure, which will presently be fully described, and pointed out the claims, reference being had 3 5 to the acccompanying drawings, forming partof this specification, and inwhich- Figure 1 is a central longitudinal section through a combustion-chamber of a suitable type, -showing a blower and the connections 4o'between same and its steam or air su ply. Fig. 2 is an end view of the machine.' ig. 3 is a transverse sectional view on the line 3 3,' Fig. 1. Fig. 4 is a central" vertical sectionl of a portion of the outer pipe betweenthe lines33and44,Fig. 1. l y

l 5 represents a combustion-chamber of a ,suitable type, which is carried by a truckframe 6, supported on wheels-7, and a set ofy forward wheels. (Not shown.) 'l 5o v 8 is a pipe entering the forward en d of the u" combustion-chamber, and connected jwith j pipe 8 is a supply-pipe 9, leading tothe tank 10, containing lvsteam, compressed air, or a My invention relates to a machine for'heatsimilar blowing agent'. Extending; through pipe'8is a fuel-supply pipe 11, co nnected at its outer end with a tan 12, containing suitable liquid fuel. If so desired, a burner may be .attached to the'inner ends ofthe pipes 8 .and 11 and the supply of steam or air and fuel iscontrolled by the valves 13 and 14 on the pipes 9 and 1 1, respectively.

, At the rear end of the combustion-chamber vis a suitable outlet, into which is fitted/a suitable conduit'for `directing the fluid heating medium, comprising'la ipe 15, having a short horizontal member an a depending member 16, extending downwardly and telescoping within a collar '17 of a hood 18. Connected with the steam or air supply ipe 9 is a branch A 19, which extends backwar ly to the rear of the combustion-chamber andI thence down-l wardly below theoutlet in said chamber and is provided at its lower end with an arm 20, extending into the de (ending pipe member 16. In, the bottom o arm 20 is a series of perforations for the outlet ofthe steam or air, which is blown'downwardly in memberv 16- through the hood 18 onto the pavement.

21 isa lever which is pivoted on the rear of the machine and is provided at its outer end with chain 22 for supporting hood 18.

In use the machine is placed in position and the hood 4lowered over the part of the pavement to befheated. Oil i s then turned on .from the fuel-tank, and a suiiicient quantity of air or steam from tank 10 is admitted to the' branch surrounding the oil-pipe to form a properl mixture forignition'and t'he maintenance of a suitable' ilame in the combustion-chamber. As soon as the chamber has become heated the valve in branch 19 is opened andthe steam or air admitted to arm 20, through the perforations in the bottom of which it escapes into branch 16. The pressure in tank 10 forces the steam or air out of arm 20 in a `et, causing a suction which serves to draw t e heated air out of the com'- bustion-chamber and forces it downwardly ICO 'come deranged through the Iintense heat of i lthe machine is limited to a minimum and the efliciency of the machine increased.

vincrease of efficiency is ldue to the fact that iThis surface,with very much higher efii ciency.

the location of the jetblowenin the conduit l the combination of a fuel-supply, a combusin a position to cause the fluid heating mel tion-chamber utilizing the fuel-supply to de- Adium to flow -toward the surface to be heated i vnot only induces avery forcible flow of said medium, but modifiesthe heating effect .of the. latter by adding its volume to the said "medium, so that instead of having an excessively hot medium which burns the pavement a moderately yet sufiiciently hot me'- diuxn is directed with great force against the I known parts of such machinery be supplied. .15.

Havingthus described my invention, lwhat 'I claim as newv therein, and desire to secure byLetters Patent, is-

`1. Anapparatus for heating surfaces, comprisilig means for supplying a fluid-heatiner medium, a conduit for directing the fiuid heatf- I'n'edium aUainst the surface to be heate and a j'et bast dischargin into the Huid. heating medium toward the surface to be heated and directin the said medium withthe blast medium a ded thereto, against said surface.

2. An a paratus for heating surfaces, comprisin eating-chamber into-which air is 8. passe to develop a fiuid heating medium, a conduit throughwhich the fiuid heating medium thus developed is directed upon the `surface to be heated, .ajet blasudischarg'ing.

into said conduit, drawing the heating medium from the combustion-chamber, minglin the blast -medium with said heating me ium to modify theeffect of the latter, driving said heatingmedium thus modified against the surface'to be heated. l

3. In an apparatus for heating surfaces, the combinationf a combustion-chamber,

means for supplying a fuel medium to said chamber for combustion therein, Whereb a fiuid heating mediumis developed, a condfiit for conducting the fluid heatin medium from the'ombustion-'chambel to he surface to be heated, a jet-blower dischargin into said conduit and developing therein a IQW of the fluid heatin Inediunitowardlthe surface -to be`heated, an 'meansfor supplying a blowing agent to said ljet-'blov'veig indep'endentof the 'Huid heating medium, whereby theuid heating medium is drawn outof the'cornbus-I' tion-chamber, modied. by a b lowin agent and forcedV through the conduit to t e surface to beheat'ed.

4. In an apparatus fer 'haug surfaces.

velop a fluid heating medium, means for supplying a blowing a ent, means for conduct- 'ing a portion of sai blowing avent to thefueling medium from the combustion-chamber s-aSuitable air-inlets for thecombustion-g -chamber may be provided and other welland cause it to flowtoward the surface to be heated and a connection through which an independent portion of the blowing agent is delivered to the jet-blower and mingled with the fiuid heating medium in imparting a fiow to the latter.

5. In a machine for heating surfaces, a

,"heating-chamber, .means for heating the interior' of said chamber, a Vertical air-conducting pipe havmg communication wlth the g interior 0f Said chamber, a hood at the lower conduitin'a direction to cause a o'W of the i a ing pipe havin communication with the interior of said c amber, a hood at the lower end of said pipe, a jet member located in a horizontal position in said pipe and having jet-holes in its lower portion, and means for supplying a fluid blast agent to said jet member.

GEORGE H. LUTZ.

Witnesses: p n

A. M. MAXWELL, 1.3. E., CARrENTER.

7. -In a device of the class described, a 

